This zen garden is located at The Huntignton Library, Art Collections and Botanical Gardens.
I really recommend to visit this beautiful place located in Pasadena, California. It was founded in 1919 by Henry E. Huntington who purchased the San Marino Ranch and transformed the working ranch into a botanical collection of rare and exotic plants, with the help of his superintendent William Hertrich. There are twelve specialized gardens with 15,000 plant varieties, covering 120 acres (485,623 square meters).
I took this photo at the Japanese garden, where you can also find a bridge over a pond with koi fish, a bonsai court, a ceremonial teahouse and a tea garden.